Bibliografias temáticas / Surface electrical properties

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Literatura científica selecionada sobre o tema "Surface electrical properties"

Autor: Grafiati
Publicado: 1 de março de 2025

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Artigos de revistas sobre o assunto "Surface electrical properties"

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Thompson, Dudley William, e Pamela Gillian Pownall. "Surface electrical properties of calcite". Journal of Colloid and Interface Science 131, n.º 1 (agosto de 1989): 74–82. http://dx.doi.org/10.1016/0021-9797(89)90147-1.

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Baichenko, A. A., Al A. Baichenko e M. A. Mel’tinisov. "Surface electrical properties of coal particles". Soviet Mining Science 21, n.º 2 (março de 1985): 181–84. http://dx.doi.org/10.1007/bf02499628.

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Rasmusson, Mikael, Bengt-Erik Mellander e Jonathan Ennis. "Surface Electrical Properties of Polystyrene Latex". Journal of Colloid and Interface Science 209, n.º 2 (janeiro de 1999): 327–40. http://dx.doi.org/10.1006/jcis.1998.5791.

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Rasmusson, Mikael, e Staffan Wall. "Surface Electrical Properties of Polystyrene Latex". Journal of Colloid and Interface Science 209, n.º 2 (janeiro de 1999): 312–26. http://dx.doi.org/10.1006/jcis.1998.5861.

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Harder, André, Anatoly Zaiat, Florian Michael Becker-Dombrowsky, Steffen Puchtler e Eckhard Kirchner. "Investigation of the Voltage-Induced Damage Progression on the Raceway Surfaces of Thrust Ball Bearings". Machines 10, n.º 10 (21 de setembro de 2022): 832. http://dx.doi.org/10.3390/machines10100832.

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In the course of the electrification of powertrains, rolling element bearings are increasingly subject to electrical damage. In contrast to mechanically generated pittings, voltage-induced surface damage is a continuous process. Though several approaches for the description of the damage state of a bearing are known, a generally accepted quantification for the bearing damage has not been established yet. This paper investigates surface properties, which can be used as a metric damage scale for the quantification of the electric bearing damage progression. For this purpose, the requirements for suitable surface properties are defined. Afterwards, thrust ball bearings are installed on a test rig, with constantly loaded mechanically and periodically damaged electrically in multiple phases. After each phase, the bearings are disassembled, the bearing surfaces are graded and measured for 45 different standardized surface properties. These properties are evaluated with the defined requirements. For the ones meeting the requirements, critical levels are presented, which allow for a quantified distinction between grey frosting and corrugation surfaces. These values are compared with measurements presented in the literature showing that the identified surface properties are suitable for the quantification of electrical bearing damages.
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Dzubenko, L. S., P. P. Gorbyk, O. O. Sapyanenko e S. M. Makhno. "The polyethylene-based composite films, containing carbon nanofibers and magnetic nanoparticles". SURFACE 14(29) (30 de dezembro de 2022): 213–20. http://dx.doi.org/10.15407/surface.2022.14.213.

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There are influence of Fe/C as polymer composition component studied, for use as PCM of special purposes, on structure, mechanical, and electrophysical properties, when regarding to goal for usage possibilty establishing for carbon and iron-containing material of Fe/C, and last was synthesized with CVD technique on iron-containing catalyst. There were PEHD- and nano-disperse addition of Fe/C - based composite films prepared, with hot pressing method, of mass equation in 42/58 for Fe/C, and addition content in PCM of 1 – 15 % mass. Then, there were films oriented with thermogradient hot stretching.. It is established, that Fe/C presence is decreasing for maximal stretching value λmax, for pure HDPE, to 5 for highly-loaded compositions. There are addition’s influence on PE phase transitions in composite films: when at low addition’s contents, then, there are forming more perfect crystallic structure of more larger and uniform crystallites by dimensions, but, at those higher - less uniform one. It is established, that specific saturation magntetization values (σs ), for composite and non-oriented films, are increasing, from 1.1 Gs∙cm3/g for film of 5 %mass. of Fe/C, to 5.6 Gs∙cm3/g (film of 15 % mass. Fe/C). There are cohertzitive power values, changing dependently from Fe/C comtent, from 97 to 99 E. It is founded, that electrical conductivity values (s), at frequency of 1 kHz , is absent, for non-oriented film of 1 %mass. Fe/C (σ=9,4∙10-11 Om-1cm-1), but, for those non-oriented ones of 5- 15 %mass. are 2,4∙10-5 ‒ 1∙10 Om-1cm-1. Where are orientational stretching actions, there are decreasing in electrical conductivity values - σ=1,4∙10-12‒2,7∙10‑1 Om-1cm-1 for films of λ=5‒6. Those films, when at own intrinsic structure-mechanical, electrical and magnetic properties, depending of Fe/C content, are perspective ones as magnetic, anti-static and electrical conductive materials.
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Pernica, Roman, Miloš Klíma, Pavel Londák e Pavel Fiala. "Modification of Insulating Properties of Surfaces of Dielectric High-Voltage Devices Using Plasma". Applied Sciences 14, n.º 11 (22 de maio de 2024): 4399. http://dx.doi.org/10.3390/app14114399.

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Plasma discharges under atmospheric pressure are applicable for modifying the electrical properties of dielectric surfaces. The aim of the plasma discharge treatment of such surfaces is to design a procedure so that its characteristic parameters improve the resulting levels of the breakdown electrical strength Eb when tested under pulsed or alternating electrical voltages. In this research, a set of functional experiments performed by using plasma in samples of two types of materials (thermoset, thermoplastic) were processed and evaluated, and the resulting effect of the magnitude of the breakdown electrical voltage, electrical intensity, and electrical conductivity of the surface were compared. A slit plasma chamber, previously described and parameterized, was employed to treat the surface of the dielectric samples. The surface structure was modified via plasma discharge without precursors, and methodologies were developed to evaluate these modifications with respect to the change in the electrical strength parameters of the insulator surface. Subsequently, the surface strength of the affected and unaffected samples was measured and evaluated as a function of exposure time, and the stability of the modification was assessed. The first methodical test showed that plasma discharge without precursors improved the long-term surface electrical strength of the dielectric surface. The test and its parameters were carried out with respect to feasibility in an industrial environment.
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Cortalezzi, Maria M. "Surface Properties Reversibly Switched Using Electrical Potential". MRS Bulletin 28, n.º 4 (abril de 2003): 258. http://dx.doi.org/10.1557/mrs2003.75.

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Lee, Rochelle S., Tae Kyum Kim, Sang Won Lee, Kyu Yeon Cho, Jong Hyun Choi, Mi Yeong Kim e Jae Cheol Shin. "Electrical Properties of Surface-Passivated GaAs Nanowires". Applied Science and Convergence Technology 27, n.º 6 (30 de novembro de 2018): 166–68. http://dx.doi.org/10.5757/asct.2018.27.6.166.

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Sugihara, S., T. Bak, J. Nowotny, M. Rekas e C. C. Sorrell. "Surface electrical properties of Gd-doped PbZrO3". Ionics 4, n.º 1-2 (janeiro de 1998): 72–81. http://dx.doi.org/10.1007/bf02375782.

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Teses / dissertações sobre o assunto "Surface electrical properties"

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Pownall, P. G. "The surface electrical properties of calcium carbonate". Thesis, University of Bristol, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379592.

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Richardson, Stephen. "Sulphide ore minerals : surface chemical properties". Thesis, Aston University, 1988. http://publications.aston.ac.uk/8068/.

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The surfaces of iron-containing sulphide minerals were oxidised by a range of inorganic oxidants, and the resultant surface alteration products studied using various spectroscopic techniques. The characterisation of surface oxidation is relevant to the alteration of ores in nature and their behaviour during flotation and leaching, of importance to the metallurgical industry. The sulphides investigated included pyrite (FeS2), hexagonal pyrrhotine (Fe9S10), monoclinic pyrrhotine (Fe7Se), violarite (FeNi2S4), pentlandite ((FeiNi)9Se), chalcopyrite (CuFeS2) and arsenopyrite (FeAsS). The surfaces were oxidised by various methods including acid (sulphuric), alkali (ammonium hydroxide), hydrogen peroxide, steam, electrochemical and air/oxygen (in a low-temperature (150ºC) furnace), The surfaces were examined using surface sensitive chemical spectroscopic methods including x-ray photoelectron spectroscopy (ms), Auger electron spectroscopy (LES) and conversion electron Mössbauer spectroscopy (CEKS). Physical characterisation of the surfaces was undertaken using scanning electron microscopy (SM), spectral reflectance measurements and optical microscopy. Bulk characterisation of the sulphide minerals was undertaken using x-ray diffraction and electron microprobe techniques. Observed phases suggested to form in most of the sulphide surfaces include Fe204, Fe1-x0, Fe202, Fe00H, Fe(OH)3, with iron II & III oxy-sulphates. The iron sulphides show variable extents of oxidation, indicating pyrite to be the most stable. Violarite shows stability to oxidation, suggested to result from both its stable spinel crystal structure, and from the rapid formation of sulphur at the surface protecting the sub-surface from further oxidation. The phenomenon of sub-surface enrichment (in metals), forming secondary sulphides, is exhibited by pentlandite and chalcopyrite, forming violarite and copper sulphides respectively. The consequences of this enrichment with regard to processing and leaching are discussed. Arsenopyrite, often a hindrance in ore processing, exhibits the formation of arsenic compounds at the surface, the dissolution of which is discussed in view of the possible environmental hazard caused by the local pollution of water systems. The results obtained allow a characterisation of the sulphides in terms of their relative stability to oxidation, and an order of stability of the sulphide surfaces is proposed. Models were constructed to explain the chemical compositions of the surfaces, and the inter-relationships between the phases determined at the surface and in the sub-surface. These were compared to the thermo-chemically predicted phases shown in Eh/pH and partial pressure diagrams! The results are discussed, both in terms of the mineralogy and geochemistry of natural ores, and the implications for extraction and processing of these ore minerals.
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Oliveira, Junior Osvaldo Novais de. "Electrical properties of Langmuir monolayers and deposited Langmuir-Blodgett films". Thesis, Bangor University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236716.

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Pennington, R. C. "Spectral properties and modes of surface microcavities". Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/66438/.

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This thesis describes the experimental investigations into the transverse mode structure of nearly hemispherical microcavities. The nearly hemispherical niicrocavity structures are fabricated electrocemically through a template of self assembled latex spheres. Controlling the electrochemical parameters, such as the electrochemical solution and electrode potential. allows a wide range of uearly henuspherical rnicrocavities to be realised. The spatial intensity profiles arid resonant frequeucies of the transverse modes of nearly hemispherical nucrocavities are measured experimentally for a wide range of cavity lengths amid mirror curvatures. The experimental mode profiles are radially symmetric Gauss-Laguerre modes, but do not display the frequency degeneracies typical of large scale optical cavities. The nearly hemispherical mnicrocavity samples are compared to investigate how the cavity parameters. such as cavity length and mirror curvature, affect the experimental spatial intensity profiles and resonant frequencies of the transverse modes. Higher order modes are observed despite the fact that they are forbidden due to the symmetrical coupling geometry. rrhe symmetry breaking is shown to be produced by the surface roughness of the curved nnrror. The frequency degeneracy lifting which occurs in the nearly hemispherical niicrocavity structures can he explained and modelled by considering non-parabolic elements in the cavity. A nmnher of mathematical models for the cavity propagation are developed based on paraxial theory. rrliese models are analysed and the predictions made from the models are compared with the experimental profiles and frequencies. The basic agreement between theory and experinient shows that the paraxial theory is able to model the cavity modes. However, the spectrum and the mnode profiles are cpnte sensitive functions of the geometry of the cavity amid the surface roughness of the cavity mirrors. The nearly hemispherical mnicrocavities are structures which offer a new fabrication technique allowing inexpensive and a ummconmplicated method of fabrication. An important feature of the nearly hemispherical microcavities is the tunablity, and the ease in which this can be achieved. The structures are also empty, and this will allow them, in the future, to be easily filled with functional optical nmaterials such as liquid crystals.
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Azam, Sufyan. "Electrical Properties and Surface Characterization of Thin Copper Films Subjected to Mechanical Vibrations". Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/670604.

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Es van estudiar les característiques mecàniques i elèctriques de les pel·lícules fines de coure unides a laminats epoxi FR4, sota càrrega tèrmica i mecànica. A la 1a etapa, es van determinar paràmetres modals de manera experimental i analítica mitjançant un mètode d’elements finits per a quatre grups de mostres, per tal d’estudiar els efectes geomètrics i la presència d’un forat central de diferents diàmetres. S'ha comprovat que aquestes mides són adequades per utilitzar-se com a plaques de circuits electrònics que experimenten canvis de freqüència significatius que van des de 40 Hz fins a 1 kHz. Es va trobar que la freqüència de ressonància fonamental de tots els exemplars era inferior a 40 Hz i la influència d’un forat central no va ser significativa per afectar les propietats modals. Durant la segona etapa de la investigació realitzada, es va determinar l'efecte de les vibracions d'alta freqüència sobre les propietats elèctriques. Experimentalment, es va trobar que les tensions induïdes a les pel·lícules primes a causa de l’alta freqüència i el nombre de cicles afecten significativament la resistència de la làmina de material i altres propietats elèctriques com la resistivitat i la conductivitat. Aquestes càrregues mecàniques redueixen en última instància el rendiment elèctric de les pel·lícules fines de coure (PCB). Les imatges SEM van mostrar la formació d'esquerdes a prop de la zona d'alta tensió; aquestes esquerdes propaguen posteriorment la fallada de l'equip. El canvi de temperatura superficial de 25ºC a 45ºC va mostrar un petit canvi en la resistència de la làmina de les pel·lícules de coure primes. Aquesta tesi ha estat, doncs, una contribució a una millor comprensió de la relació entre l'acumulació de danys i el rendiment elèctric de les plaques PCB i MEMS i pot conduir a millores en la seva fabricació. Això fa que els resultats tinguin una gran importància pràctica i que la metodologia d’assaig desenvolupada es pugui estendre a altres pel·lícules primes.
Se estudiaron las características mecánicas y eléctricas de películas delgadas de cobre adheridas a laminados epoxi FR4, bajo carga térmica y mecánica. En la 1ª etapa se determinaron de forma experimental y analítica los parámetros modales como las frecuencias naturales y los ratios de amortiguamiento utilizando un método de elementos finitos para cuatro grupos de muestras, con el fin de estudiar los efectos geométricos y la presencia de un agujero central de diferentes diámetros. Se ha descubierto que estos tamaños son adecuados para su uso como placas de circuitos electrónicos que sufren cambios de frecuencia significativos que van desde 40 Hz a 1 kHz. Se encontró que la frecuencia de resonancia fundamental de todas las muestras era inferior a 40 Hz y la influencia de un orificio central no fue significativa para afectar las propiedades modales. Durante la segunda etapa de la investigación realizada, se determinó el efecto de las vibraciones de alta frecuencia sobre las propiedades eléctricas. Se encontró experimentalmente que las tensiones inducidas en las películas delgadas debido a la alta frecuencia y al número de ciclos afectan significativamente la resistencia de la hoja del material y otras propiedades eléctricas como la resistividad y la conductividad. Estas cargas mecánicas finalmente reducen el rendimiento eléctrico de las películas delgadas de cobre (PCB). Las imágenes SEM mostraron la formación de grietas cerca de la zona de alta tensión; estas fisuras propagan posteriormente la avería del equipo. El cambio de temperatura de la superficie de 25ºC a 45ºC mostró un pequeño cambio en la resistencia laminar de las películas delgadas de cobre. Por lo tanto, esta tesis ha sido una contribución a una mejor comprensión de la relación entre la acumulación de daños y el rendimiento eléctrico de las placas de PCB y MEMS y puede conducir a mejoras en su fabricación. Esto hace que los resultados sean de gran importancia práctica y la metodología de ensayo desarrollada se puede extender a otras películas delgadas.
Mechanical and electrical characteristics of thin copper films bonded to FR4 epoxy laminates, under thermal and mechanical loading, were studied. At the 1st stage modal parameters such as Natural frequencies and damping ratios were determined experimentally and analytically using a finite element method for four groups of samples, in order to study the geometric effects and the presence of a central hole of different diameters. It has been found that these sizes are suitable to be used as electronic circuit boards that undergo significant frequency changes ranging from 40 Hz to 1 kHz. The fundamental resonance frequency of all the specimens was found to be less than 40 Hz and the influence of a central hole was not significant to affect the modal properties. During the second stage of the accomplished research, the effect of high frequency vibrations on the electrical properties were determined. It was found experimentally that the stresses induced in the thin films due to high frequency and number of cycles significantly affect material sheet resistance and other electrical properties such as resistivity and conductivity. These mechanical loadings ultimately reduces electrical performance of thin copper films (PCBs). SEM images showed formation of cracks near the high stress zone; these cracks later propagates the failure of the equipment. The surface temperature change from 25ºC to 45ºC showed a little change in sheet resistance of thin copper films. This thesis has thus been a contribution to a better understanding of the relationship between damage accumulation and electrical performance of PCB boards and MEMS and may lead to improvements of their fabrication. This makes the results of great practical importance and the developed assay methodology can be extended to other thin films.
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Gittens, Ibacache Rolando Arturo. "The role of nanostructural and electrical surface properties on the osteogenic potential of titanium implants". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45975.

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Dental and orthopaedic implants are currently the solutions of choice for teeth and joint replacements with success rates continually improving, but they still have undesirable failure rates in patients who are compromised by disease or age, and who in many cases are the ones most in need. The success of titanium (Ti) implants depends on their ability to osseointegrate with the surrounding bone and this, in turn, is greatly dependent on the surface characteristics of the device. Advancements in surface analysis and surface modification techniques have improved the biological performance of metallic implants by mimicking the hierarchical structure of bone associated with regular bone remodeling. In this process, damaged bone is resorbed by osteoclasts, which produce resorption lacunae containing high microroughness generated after mineral dissolution under the ruffled border, as well as superimposed nanoscale features created by the collagen fibers left at the surface. Indeed, increasing Ti surface roughness at the micro and sub-microscale level has been shown to increase osteoblast differentiation in vitro, increase bone-to-implant contact in vivo, and accelerate healing times clinically. Recently, the clinical application of surface nanomodification of implants has been evaluated. Still, most clinically-available devices remain smooth at the nanoscale and fundamental questions remain to be elucidated about the effect of nanoroughness on the initial response of osteoblast lineage cells. Another property that could be used to control osteoblast development and the process of osseointegration is the electrical surface charge of implants. The presence of endogenous electrical signals in bone has been implicated in the processes of bone remodeling and repair. The existence of these native signals has prompted the use of external electrical stimulation to enhance bone growth in cases of fractures with delayed union or nonunion, with several in vitro and in vivo reports confirming its beneficial effects on bone formation. However, the use of electrical stimulation on Ti implants to enhance osseointegration is less understood, in part because of the lack of in vitro models that truly represent the in vivo environment. In addition, an aspect that has not been thoroughly examined is the electrical implication of implant corrosion and its effect on the surrounding tissue. Implants are exposed to extreme conditions in the body such as high pH during inflammation, and cyclic loads. These circumstances may lead to corrosion events that generate large electrochemical currents and potentials, and may cause abnormal cell and tissue responses that could be partly responsible for complications such as aseptic loosening of implants. Consequently, Ti implants with tailored surface characteristics such as nanotopography and electrical polarization, could promote bone healing and osseointegration to ensure successful outcomes for patients by mimicking the biological environment of bone without the use of systemic drugs. The objective of this thesis is to understand how surface nanostructural and electrical characteristics of Ti and Ti alloy surfaces may affect osteoblast lineage cell response in vitro for normal tissue regeneration and repair. Our central hypothesis is that combined micro/nanostructured surfaces, as well as direct stimulation of Ti surfaces with fixed direct current (DC) potentials, can enhance osteoblast differentiation.
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Mantena, Keerthi Varma. "Electrical and mechanical properties of MWCNT filled conductive adhesives on lead free surface finished PCB's". Lexington, Ky. : [University of Kentucky Libraries], 2009. http://hdl.handle.net/10225/1084.

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Thesis (M.S.)--University of Kentucky, 2009.
Title from document title page (viewed on October 28, 2009). Document formatted into pages; contains: viii, 44 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 42-43).
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Agreda, Adrian. "Electrical control of the nonlinear properties of plasmonic nanostructures". Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCK010.

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Ce travail rassemble les technologies de nanoélectronique et de nano-photonique pour créer un dispositif électro-plasmonique dont les propriétés optiques linéaires et non linéaires sont contrôlées électriquement. Ici, nous présentons la première démonstration de la modulation de photoluminescence non linéaire par des moyens électriques dans un cas d'étude simple. A cette fin, les nanoantennes plasmoniques sont interfacées avec des connexions électriques induisant des régions localisées d’accumulation et de déplétion d'électrons et affectant ainsi la réponse optique. De plus, une analyse complète de la photoluminescence non linéaire dans les nanofils plasmoniques est réealisée. La délocalisation et le transport des non-linéarités apportées par de telles structures permettent l’activation à distance des signaux. Différents aspects, dont les mécanismes sous-jacents à la modulation électrique et les processus dictant la généeration de photoluminescence non linéaire, sont systématiquement explorés
This work brings nano-electronics and nano-photonics technologies together to create an electron- plasmon device whose linear and nonlinear optical properties are electrically controlled. Here, we present the first demonstration of nonlinear photoluminescence modulation by electrical means in an uncluttered configuration. To this purpose, plasmonic nanoantennas are interfaced with elec- trical connections inducing localized regions of electron accumulation and depletion and therefore affecting the optical response. Additionally, a complete analysis of the nonlinear photoluminescence in plasmonic nanowires is carried out. The delocalization and transport of nonlinearities provided by such structures allow the remote activation of the signals. Different aspects including the un- derlying mechanisms behind the electrical modulation and the processes dictating the nonlinear photoluminescence generation are systematically explored
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Johnson, Brady Allen. "A Methodology to Analyze Surface Recombination Velocity and Other Properties of Cadmium Telluride Using Time Resolved Photoluminescence". University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1448881819.

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Chan, Chi Lun. "Alp-CuInSe2 tunnel MIS Schottky diodes & surface properties of crystalline p-CuInSe2". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61911.

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Livros sobre o assunto "Surface electrical properties"

1

Szymczyk, Anthony. Surface electrical phenomena in membranes and microchannels. Trivandrum, Kerala, India: Transworld Research Network, 2008.

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2

Birdi, K. S. Introduction to electrical interfacial phenomena. Boca Raton: Taylor & Francis, 2010.

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3

K, Cheng Leo, e Buist Martin L, eds. Mathematical modelling the electrical activity of the heart: From cell to body surface and back again. New Jersey: World Scientific, 2005.

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4

DeMinco, N. Free-field measurements of the electrical properties of soil using the surface wave propagation between two monopole antennas. Washington, DC]: U.S. Department of Commerce, National Telecommunications and Information Administration, 2012.

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Hans-Ulrich, Finzel, ed. Electrical resistivity of thin metal films. Berlin: Springer, 2007.

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6

E, Oh Jae, e United States. National Aeronautics and Space Administration., eds. Surface morphologies and electrical properties of molecular beam epitaxial InSb and InAs xS̲bx̲ grown on GaAs and InP substrates. [Washington, D.C.?: National Aeronautics and Space Administration, 1989.

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7

Janz, George J. Thermodynamic and transport properties for molten salts: Correlation equations for critically evaluated density, surface tension, electrical conductance, and viscosity data. Washington, D.C: published by the American Chemical Society and the American Institute of Physics for the National Bureau of Standards, 1988.

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8

Okpalugo, Thomas Ifeanyi Timothy. The haemocompatibility of ultra-smooth silicon and nitrogen doped hydrogenated amorphous carbon thin films: The role of the microstructure, electrical properties, and surface energy. [S.l: The author], 2002.

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Kelly, J. J. A user's guide to the Zwikker-Kosten Transmission Line Code (ZKTL). Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

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Munn, R. W. Electrical and Related Properties of Organic Solids. Dordrecht: Springer Netherlands, 1997.

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Capítulos de livros sobre o assunto "Surface electrical properties"

1

Wanzhong, Yin, e Xu Kuangdi. "Mineral Surface Electrical Properties". In The ECPH Encyclopedia of Mining and Metallurgy, 1–2. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-0740-1_560-1.

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Wanzhong, Yin. "Mineral Surface Electrical Properties". In The ECPH Encyclopedia of Mining and Metallurgy, 1330. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-2086-0_560.

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Christensen, Thomas M. "Electrical, Magnetic, Optical, and Thermal Properties". In Understanding Surface and Thin Film Science, 99–133. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9780429194542-7.

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Yan, Jiyuan, Qing Xie, Yanze Song e Yixiao Zhang. "Modulation of Surface Properties of Epoxy Resin by Plasma Modification". In Electrical Materials, 79–133. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-9050-4_3.

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Zhang, Yanfang, Youyuan Wang, Yudong Li e Zhanxi Zhang. "The Study on Surface Properties of Nanoparticle-Modified Microcapsules". In Lecture Notes in Electrical Engineering, 420–29. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31680-8_43.

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Ahmed, Modi, e Khaliq Beg. "Other Properties (BET Surface Area, Conductivity, Organic Matter, and pH)". In Atlas of Fallen Dust in Kuwait, 197–204. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66977-5_8.

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Abstract Brunauer, Emmett, and Teller (BET) test were applied to dust samples in which samples (BET) surface area is highly related to the roundness of dust particles. The higher angularity and low roundness of the dust particles show a higher (BET) surface area. The roundness is also related to the particlesize distribution and mineralogical composition. The electrical conductivity test relates very well with the chemical and physical properties of dust samples in the transmission of an electrical current. The organic matter content was measured using the ignition method and the pH of the samples was recorded. Maps of the distribution of high and low BET concentrations, electrical conductivity EC, organic matter content, pH.
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Fregoso, O. A., J. G. Mendoza-Alvarez e F. Sánchez-Sinencio. "Structure and Electrical Properties of rf Sputtered Cd1−x Fe x Te Thin Films". In Lectures on Surface Science, 52–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71723-9_6.

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Liu, Dayou, Jiaxuan Han e Haiyun Jin. "Preparation and Anti-icing Properties of Chemically Etched Superhydrophobic Aluminum Surface". In Lecture Notes in Electrical Engineering, 15–27. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-7413-9_2.

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Wang, Peng, Qizhi Chen, Jiaxuan Zhang e Zinan Wang. "Research on the Influence of Nanoparticles and Surface Microstructure on the Hydrophobic and Electrical Properties of Silicone Rubber Materials". In Electrical Materials, 189–216. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-9050-4_5.

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Lafon, J. P., e J. M. Millet. "On the Electrical Effects of the Presence of Fluff on the Surface of Cosmic Dust Grains". In Properties and Interactions of Interplanetary Dust, 341–46. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5464-9_67.

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Trabalhos de conferências sobre o assunto "Surface electrical properties"

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Solis, Jose L., Johannes Frantti e Vilho Lantto. "A study of electrical and optical properties of sputtered SnO2-WO3 thin films". In The 8th Latin American congress on surface science: Surfaces , vacuum, and their applications. AIP, 1996. http://dx.doi.org/10.1063/1.51207.

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Komar, Paulina, Patrycja Śpiewak, Marcin Gębski, Magdalena Marciniak, Tomasz G. Czyszanowski, James A. Lott, Michał Wasiak, Ricardo Rosales e Luca Sulmoni. "The influence of the VCSEL design on its electrical modulation properties". In Vertical-Cavity Surface-Emitting Lasers XXII, editado por Kent D. Choquette e Chun Lei. SPIE, 2018. http://dx.doi.org/10.1117/12.2289582.

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Fadilah, T., L. Gross e R. Schaa. "Estimation of Aquifer Properties Using Surface Based Electrical Resistivity Tomography". In EAGE-HAGI 1st Asia Pacific Meeting on Near Surface Geoscience and Engineering. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201800374.

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Khakiev, Z. B., A. V. Morozov, V. L. Shapovalov e V. A. Yavna. "GPR Method for Determining the Electrical Properties of Soils". In Near Surface Geoscience 2012 – 18th European Meeting of Environmental and Engineering Geophysics. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20143368.

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Petersen, H., W. Rabbel, R. Horn e L. Volk. "Sensitivity of Electrical Properties to Soil Compaction - Case Study". In Near Surface 2010 - 16th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.20144901.

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Yaqiang Liu, Zhenlian An, Jun Cang, Feihu Zheng e Yewen Zhang. "Preliminary study on surface properties of surface fluorinated epoxy resin insulation". In 2011 International Symposium on Electrical Insulating Materials (ISEIM). IEEE, 2011. http://dx.doi.org/10.1109/iseim.2011.6826334.

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Park, S. G., S. W. Shin, D. K. Lee, C. R. Kim e J. S. Son. "Relationship between Electrical Resistivity and Physical Properties of Rocks". In Near Surface Geoscience 2016 - First Conference on Geophysics for Mineral Exploration and Mining. Netherlands: EAGE Publications BV, 2016. http://dx.doi.org/10.3997/2214-4609.201602101.

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Eastman, M. P., M. E. Hagerman, T. L. Porter, R. A. Parnell, J. L. Attuso, M. Bradley e D. Thompson. "Electrical and surface properties of clay-conducting polymer composites". In First International Conference on Interactive Paper, editado por Graham G. Allan e Jean J. Robillard. SPIE, 1997. http://dx.doi.org/10.1117/12.280781.

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Gross, Detlev W. "Void and surface partial discharge pattern properties". In 2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika). IEEE, 2018. http://dx.doi.org/10.1109/diagnostika.2018.8526142.

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Park, J., Claire Gu e B. Lee. "Surface static properties of plasma treated FRP". In 2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena. IEEE, 2006. http://dx.doi.org/10.1109/ceidp.2006.311962.

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Relatórios de organizações sobre o assunto "Surface electrical properties"

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Hartell, Julie, Matthew O’Reilly e Hang Zeng. Measuring Transport Properties of Portland Cement Concrete Using Electrical Resistivity. Illinois Center for Transportation, agosto de 2023. http://dx.doi.org/10.36501/0197-9191/23-012.

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Although classification tables based on susceptibility to chloride ion permeability are recommended in AASHTO T 358, the classification levels with respect to durability parameters may or may not be adequate. Of interest for concrete pavement performance, this study verifies the recommended classification levels against standard durability testing such as corrosion, salt scaling, and freeze-thaw. The researchers conducted corrosion, salt scaling, and freeze-thaw durability tests in parallel with electrical surface resistivity testing to compare performance classifications for each method. Twenty-four mixture designs were evaluated. The designs vary in water-to-cementitious material ratio (0.4, 0.45, and 0.5 w/cm ratio), supplementary cementitious material type (100% ordinary Portland cement, 20% Class C fly ash, 40% Grade 100 slag cement, and 8% silica fume replacements), and air content (air entrained and non-air entrained). The results of the experimental study indicate that there is no clear relationship between concrete electrical conductivity and durability performance based on standard methods of testing. It may not be appropriate for the determination of durability performance of a concrete mixture for concrete pavement construction. However, the test method does present advantages, as mixtures of similar composition and design can yield the same results over time under standardized curing. Here, resistivity-time curves could be a useful tool as part of a quality control and quality assurance program to ensure consistency in concrete delivery during construction.
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Friedman, Shmuel, Jon Wraith e Dani Or. Geometrical Considerations and Interfacial Processes Affecting Electromagnetic Measurement of Soil Water Content by TDR and Remote Sensing Methods. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7580679.bard.

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Time Domain Reflectometry (TDR) and other in-situ and remote sensing dielectric methods for determining the soil water content had become standard in both research and practice in the last two decades. Limitations of existing dielectric methods in some soils, and introduction of new agricultural measurement devices or approaches based on soil dielectric properties mandate improved understanding of the relationship between the measured effective permittivity (dielectric constant) and the soil water content. Mounting evidence indicates that consideration must be given not only to the volume fractions of soil constituents, as most mixing models assume, but also to soil attributes and ambient temperature in order to reduce errors in interpreting measured effective permittivities. The major objective of the present research project was to investigate the effects of the soil geometrical attributes and interfacial processes (bound water) on the effective permittivity of the soil, and to develop a theoretical frame for improved, soil-specific effective permittivity- water content calibration curves, which are based on easily attainable soil properties. After initializing the experimental investigation of the effective permittivity - water content relationship, we realized that the first step for water content determination by the Time Domain Reflectometry (TDR) method, namely, the TDR measurement of the soil effective permittivity still requires standardization and improvement, and we also made more efforts than originally planned towards this objective. The findings of the BARD project, related to these two consequential steps involved in TDR measurement of the soil water content, are expected to improve the accuracy of soil water content determination by existing in-situ and remote sensing dielectric methods and to help evaluate new water content sensors based on soil electrical properties. A more precise water content determination is expected to result in reduced irrigation levels, a matter which is beneficial first to American and Israeli farmers, and also to hydrologists and environmentalists dealing with production and assessment of contamination hazards of this progressively more precious natural resource. The improved understanding of the way the soil geometrical attributes affect its effective permittivity is expected to contribute to our understanding and predicting capability of other, related soil transport properties such as electrical and thermal conductivity, and diffusion coefficients of solutes and gas molecules. In addition, to the originally planned research activities we also investigated other related problems and made many contributions of short and longer terms benefits. These efforts include: Developing a method and a special TDR probe for using TDR systems to determine also the soil's matric potential; Developing a methodology for utilizing the thermodielectric effect, namely, the variation of the soil's effective permittivity with temperature, to evaluate its specific surface area; Developing a simple method for characterizing particle shape by measuring the repose angle of a granular material avalanching in water; Measurements and characterization of the pore scale, saturation degree - dependent anisotropy factor for electrical and hydraulic conductivities; Studying the dielectric properties of cereal grains towards improved determination of their water content. A reliable evaluation of the soil textural attributes (e.g. the specific surface area mentioned above) and its water content is essential for intensive irrigation and fertilization processes and within extensive precision agriculture management. The findings of the present research project are expected to improve the determination of cereal grain water content by on-line dielectric methods. A precise evaluation of grain water content is essential for pricing and evaluation of drying-before-storage requirements, issues involving energy savings and commercial aspects of major economic importance to the American agriculture. The results and methodologies developed within the above mentioned side studies are expected to be beneficial to also other industrial and environmental practices requiring the water content determination and characterization of granular materials.
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Barnes, Eftihia, Jennifer Jefcoat, Erik Alberts, Hannah Peel, L. Mimum, J, Buchanan, Xin Guan et al. Synthesis and characterization of biological nanomaterial/poly(vinylidene fluoride) composites. Engineer Research and Development Center (U.S.), setembro de 2021. http://dx.doi.org/10.21079/11681/42132.

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The properties of composite materials are strongly influenced by both the physical and chemical properties of their individual constituents, as well as the interactions between them. For nanocomposites, the incorporation of nano-sized dopants inside a host material matrix can lead to significant improvements in mechanical strength, toughness, thermal or electrical conductivity, etc. In this work, the effect of cellulose nanofibrils on the structure and mechanical properties of cellulose nanofibril poly(vinylidene fluoride) (PVDF) composite films was investigated. Cellulose is one of the most abundant organic polymers with superior mechanical properties and readily functionalized surfaces. Under the current processing conditions, cellulose nanofibrils, as-received and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized, alter the crystallinity and mechanical properties of the composite films while not inducing a crystalline phase transformation on the 𝛾 phase PVDF composites. Composite films obtained from hydrated cellulose nanofibrils remain in a majority 𝛾 phase, but also exhibit a small, yet detectable fraction of 𝛼 and ß PVDF phases.
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Chell, G. Graham. L52310 Criteria for Evaluating Failure Susceptibility Due to Crack Defects Phase II. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), outubro de 2010. http://dx.doi.org/10.55274/r0010691.

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Seam cracks can pose a serious threat to the integrity of electric resistance welded (ERW) liquid and gas pipelines. Of concern to the industry is not just the assessment of cracks under service conditions, but also ways that may be used to establish the remaining lives of pipelines based on the results of a hydrostatic pressure test. An accurate crack assessment procedure is required. The main objective of Phase II is to validate the J-based crack assessment method developed in Phase I by using it to predict the results of full-scale burst tests on seam-welded pressurized pipes containing axial surface flaws. The comparisons between measured and predicted burst test conditions demonstrated that the Level 3C (J-based) assessment resulted in conservatively calculated critical burst conditions when fracture toughness values measured using highly constrained bend specimens were used in the analysis. This initial validation exercise highlighted some of the difficulties that may be encountered when attempting to validate the accuracy of advanced flaw assessment methodologies using vintage thin-walled pipe sections containing axial cracks. A second set of validation calculations were performed using modified material properties chosen to compensate for the effects of (a) extraneous plastic strains on stress-strain curves measured on flattened tensile specimens and (b) plastic constraint effects, and the J-based Level 3C assessment methodology developed in Phase I predicted accurate critical flaw sizes and critical pressures for the burst test pipe samples.
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